A Human Tyrosine Phosphatase Interactome Mapped by Proteomic Profiling

J Proteome Res. 2017 Aug 4;16(8):2789-2801. doi: 10.1021/acs.jproteome.7b00065. Epub 2017 Jul 18.


Tyrosine phosphatases play a critical role in many cellular processes and pathogenesis, yet comprehensive analysis of their functional interacting proteins in the cell is limited. By utilizing a proteomic approach, here we present an interaction network of 81 human tyrosine phosphatases built on 1884 high-confidence interactions of which 85% are unreported. Our analysis has linked several phosphatases with new cellular processes and unveiled protein interactions genetically linked to various human diseases including cancer. We validated the functional importance of an identified interaction network by characterizing a distinct novel interaction between PTPN5 and Mob1a. PTPN5 dephosphorylates Mob1a at Y26 residue. Further, we identify that PTPN5 is required for proper midbody abscission during cytokinesis through regulation of Mob1a dephosphorylation. In conclusion, our study provides a valuable resource of tyrosine phosphatase interactions, which can be further utilized to dissect novel cellular functions of these enzymes.

Keywords: Mob1a; PTPN5; cytokinesis; interactome; multiprotein complexes; phosphatase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / metabolism
  • Cytokinesis
  • Humans
  • Phosphorylation
  • Protein Interaction Mapping / methods
  • Protein Interaction Maps / physiology*
  • Protein Tyrosine Phosphatases / metabolism*
  • Protein Tyrosine Phosphatases, Non-Receptor / metabolism
  • Proteomics / methods*


  • Adaptor Proteins, Signal Transducing
  • MOB1A protein, human
  • PTPN5 protein, human
  • Protein Tyrosine Phosphatases
  • Protein Tyrosine Phosphatases, Non-Receptor